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MHT CET2019Morning ShiftPhysicsAlternating CurrentActual

A coil has inductance 2H. The ratio of its reactance, when it is connected first to an AC source and then to DC source, is

Options

  1. AZero
  2. B1
  3. CLess than 1
  4. DInfinity

Correct answer

D. Infinity

Step-by-step solution

Given, inductance of coil, L = 2H Reactance of coil, when it is connected to AC source, X L A C = 1 ω L where, ω = angular frequency X L ω = 1 2 μ ω For DC source, inductor coil behaves pure conductor, hence X L D C = 0 ∴ X L A C X L D C = 2 ω 0 = ∞ (at infinity)

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